I'm looking for a drug that comes in liquid form?

I'm looking for drug, comes in liquid form. Actually more like a gel, but was prescribed to take it orally. It was extremely viscous and it I was to gargle with it only. (Don't know if you can to ingest it nor not: it was prescribed to me when I had strep throat really bad.) It begins with the letter "X" and I'm sure there was an "o" somewhere in the name. It deaden pain instantly. And when I say instantly, I mean I couldn't gargle it (was too slimy - felt like snail slime would, I imagined), so I used long Q-Tip and painted back of throat. My throat would be numb before I had the Q-Tip out of my mouth. That's how fast it numbed whatever you put it on.) Does anyone know of what it is?